Which physical pest control method can be combined with seed treatment?

The correct choice refers to crop rotation, which is a physical pest control method that can effectively complement seed treatment. Crop rotation involves changing the types of crops grown in a specific area over time, which can disrupt the life cycles of pests and reduce their populations. This method can help manage soil-borne pathogens and pests that may affect newly treated seeds, ensuring that the environmental conditions are less favorable for pest survival and reproduction.

In the context of seed treatment, where soil-borne diseases and pests might specifically target the seeds or seedlings, implementing crop rotation can be very beneficial. It enhances the effectiveness of seed treatments by reducing the likelihood of pests re-emerging, thus promoting healthier crop growth.

The other methods are more focused on direct application of chemicals or manipulation of the environment rather than an integrated approach that includes changes in crop variety and planting strategies. Pesticide application and soil fumigation can damage beneficial organisms in the soil and rely more on chemical interventions rather than physical methods. Water management, while important for overall crop health, does not specifically target pests or diseases in relation to seed treatment in the same effective way as crop rotation does.